cern::gp::actions::support::ContextAction Class Reference
Static Public Member Functions | |
| static void | setContext (Object ctx) |
| static Object | unsetContext () |
Protected Member Functions | |
| final void | performAction (GPNode[] activatedNodes) |
| abstract void | performAction (GPNode[] activatedNodes, Object context) |
Static Private Attributes | |
| static WeakReference | ref |
Detailed Description
An action that contains a context in a static variable.
(The implementation uses a weak reference and to help you avoid memory leaks.) Please remember that GP (NetBeans) actions are singletons, and you are not supposed to instantiate them.
- Version:
- Revision
- 1.2
- Date
- 2006/09/25 08:52:36
Member Function Documentation
| abstract void cern::gp::actions::support::ContextAction::performAction | ( | GPNode[] | activatedNodes, | |
| Object | context | |||
| ) | [protected, pure virtual] |
A method called by GP when you invoke this action. You have to implement this method with the action you want to execute. Please note that the context parameter may be null.
- Parameters:
-
activatedNodes the nodes currently selected context the object set with setContext(Object) can be null
| final void cern::gp::actions::support::ContextAction::performAction | ( | GPNode[] | activatedNodes | ) | [inline, protected, virtual] |
the action will be enabled only if the super class enables it and if the context is not null.
- See also:
- org.openide.util.actions.NodeAction::enable(Node[])
protected boolean enable(Node[] nodes) { return super.enable(nodes) && (ref != null) && (ref.get() != null); }
Implements cern::gp::actions::support::NodeAction.
References ref.
| static void cern::gp::actions::support::ContextAction::setContext | ( | Object | ctx | ) | [inline, static] |
set a context object. Please remember that Actions are singletons, and therfore this context is shared by all places where this action is used.
- Parameters:
-
ctx the object containing the context
References ref.
| static Object cern::gp::actions::support::ContextAction::unsetContext | ( | ) | [inline, static] |
Member Data Documentation
WeakReference cern::gp::actions::support::ContextAction::ref [static, private] |
Referenced by performAction(), setContext(), and unsetContext().
The documentation for this class was generated from the following file:
